A SIMPLE PLAN FOR THE Δ RESONANCE
2003 ◽
Vol 18
(03)
◽
pp. 421-430
Keyword(s):
P Wave
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We construct the Δ resonance as a superposition of a bare Δ state and the πN continuum. It is parametrized by three coupling constants for local πNΔ and ππ NN couplings and the Δ mass. The latter incorporates the mass renormalization due to the πNΔ interaction, while the results depend only weakly, if at all, on its wave-function renormalization. Three more renormalization constants are needed for the derivative contact interaction. They allow one to generate the Δ resonance dynamically. A large number of fits test the quality of different model assumptions in the P33, P31 and P13p-wave πN scattering channels.
Keyword(s):
1966 ◽
Vol 16
(13)
◽
pp. 601-601
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1980 ◽
Vol 63
(4)
◽
pp. 1384-1392
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2000 ◽
Vol 15
(07)
◽
pp. 509-515
◽
Keyword(s):
2006 ◽
Vol 21
(36)
◽
pp. 2763-2777
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